# Series and Number Patterns IQ Test Practice Questions

#### Question No 1

E , H , K , N , Q , T , ?

Solution!
Skip two alphabets..

#### Question No 2

Find the odd man out, 3, 5, 11, 14, 17, 21

Solution!
Each of the numbers except 14 is an odd number.! !The number '14' is the only EVEN number..

#### Question No 3

Which number is the odd one out, 2, 5, 10, 17, 26, 37, 50, 64

Solution!
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1! !But, 64 is out of pattern..

#### Question No 4

71 , 25 , 83 , 37 , 95 , 49 , ?

Solution!
Two parallel series both with adding 12..

#### Question No 5

0 , 3 , 8 , 15 , ?

Solution!
Add 3 , 5 , 7,....

#### Question No 6

2 , 14 , 32 , 56 , 86 , ?

Solution!
Add 12 , 18 , 24 , 30 , 36,....

#### Question No 7

Which number is the odd one out, 10, 25, 45, 54, 60, 75, 80

Solution!
Each of the numbers except 54 is multiple of 5..

#### Question No 8

C , F , J , O , ?

Solution!
Skip 2 , 3 , 4,... alphabets..

#### Question No 9

2 , 6 , 15 , 34 , 73 , ?

Solution!
Multiply with 2 and add 2 , 3 , 4 , 5 , 6,....

#### Question No 10

1000 , 971.4 , 942.8 , 914.2 , 885.6 , ?

Solution!
Deduct 28.6 each time..

#### Question No 11

F , G , I , L , P , ?

Solution!
Skip alphabets 0,1,2,....

#### Question No 12

7 , 12 , 19 , 28 , ?

Solution!
add 5 , 7 , 9 , 11,....

#### Question No 13

0.67 , 0.69 , 0.48 , 0.88 , 0.29 , 1.07 , ?

Solution!
There are two series!Subtract 0.19 from the series starting with 0.67 and add 0.19 from the series starting with 0.69..

#### Question No 14

759 , 675 , 335 , 165 , ?

Solution!
Each number is formed by multiplying the number formed by the first two digits of the previous number by its third digit.! !So, 16 * 5 = 80.

#### Question No 15

F , I , M , P , T , W , ?

Solution!
Skip 2 and 3 alphabets alternatively..

#### Question No 16

12 , 14 , 34 , 36 , 56 , 58 , 78 , ?

Solution!

#### Question No 17

B , C , E , G , K , ?

Solution!
Prime numbers 2, 3 , 5 , 7 , 11 , 13,....

#### Question No 18

4 , 7 , 15 , 29 , 59 , 117 , ?

Solution!
Multiply with 2 and subtract and add 1 alternatively..

#### Question No 19

Which number is the odd one out, 41, 43, 47, 53, 61, 71, 73, 81

Solution!
Each of the numbers except 81 is a prime number..

#### Question No 20

2 , 20 , 42 , 68 , 98 , ?

Solution!
Add 18 , 22 , 26 , 30 , 34,....

#### Question No 21

B , L , R , T , ?

Solution!
Skip alphabets 10 , 6 , 2 , -2 , -6,....

#### Question No 22

T , Q , M , H , ?

Solution!
Skip 2 , 3 , 4,... alphabets in reverse order..

#### Question No 23

63 , 35 , 15 , 3 , ?

Solution!
8^2 - 1 = 63!and!6^2 - 1 = 35!and!4^2 - 1 = 15!and!2^2 - 1 = 3!in the same way!0^2 - 1 = -1.

#### Question No 24

6 , 8 , 10 , 14 , 18 , 26 , 34 , 50 , 66 , ?

Solution!
Add 2, 4, 4, 8, 8, 16, 16,....

#### Question No 25

1 , 2 , 4 , 8 , ?

Solution!

#### Question No 26

7964325 is to 6975234 , 5822139 is to 2859312 as 7469851 is to ?

Solution!
Reverse the first three digits then reverse the last four digits..

#### Question No 27

2 , 7 , 5 , 5 , 8 , 3 , 11 , ?

Solution!
Two parallel series one with adding 3 and other with subtracting 2..

#### Question No 28

-6 , 9 , -27/2 , 81/4 , -243/8 , ?

Solution!
Multiply previous term with -3/2 to find next term..

#### Question No 29

14 , 16 , 28 , 32 , 42 , 48 , 56 , 64 , ? , ?

Solution!
There are two interwoven sequences, add 14 starting at 14 and add 16 starting at 16..

#### Question No 30

9 , 18 , 27 , ? , 45 , ? , 63

Solution!

#### Question No 31

1 , 1 , 2 , ? , 24 , 120 , 720

Solution!
Multiply by 1, 2, 3 and so on....

#### Question No 32

Which number is the odd one out, 1, 4, 9, 16, 23, 25, 36

Solution!
Each of the numbers except 23, is perfect square..

#### Question No 33

Which number is the odd one out, 3, 5, 7, 12, 17, 19

Solution!
Each of the numbers is a prime number except 12..

#### Question No 34

25 , 50 , 27 , 46 , 31 , 38 , 39 , ?

Solution!
There are two interwoven sequences.!Add 2, 4 and 8 from the sequence starting with 25!and subtract 4, 8 and 16 from the sequence starting with 50.

#### Question No 35

1 , 2 , 3 , 5 , 7 , 10 , 13 , 17 , 21 , ? , ?

Solution!
+1, +1, +2, +2, +3, +3, +4, +4, +5, +5.

#### Question No 36

87 , 102 , 119 , 138 , 159 , ?

Solution!
Adding 15 , 17 , 19,....

#### Question No 37

78214 and 292 , 38421 and 459 , 69517 and ?

Solution!
78 + 214 = 292!38 + 421 = 459! !So, 69 + 517 = 586.

#### Question No 38

3 , 10 , 33 , 104 , ?

Solution!
Multiply with 3 and add 1, 3, 5, 7,....

#### Question No 39

3/81 , 4/256 , 5/625 , ?

Solution!
Add 1 in numerator and in denominator!(3*3)^2 = 81!(4*4)^2 = 256!(5*5)^2 = 625!in the same way!(6*6)^2 = 1296.

#### Question No 40

0 , 1 , 4 , 9 , 16 , 25 , 36 , 49 , ?

Solution!
Add 1, 3, 5, 7, etc..

#### Question No 41

AZ , DX , HU , MQ , ?

Solution!
skip 2 , 3 , 4,... alphabets to find first character and subtract 1 , 2 , 3,... alphabets to find second character..

#### Question No 42

X , U , Q , N , J , G , ?

Solution!
Skip 2 and 3 alphabets alternatively in reverse..

#### Question No 43

C , F , K , R , ?

Solution!
Skip 2 , 4 , 6 , 8,... alphabets.

#### Question No 44

6 , H , 9 , K , 11 , M , 14 , P , 16 , R , 19 , U , 21 , ?

Solution!
Add 3 and 2 alternatively in number series and skip 2 and 1 alphabets alternatively.

#### Question No 45

Which number is the odd one out, 10, 14, 16, 18, 21, 24, 26

Solution!
All numbers are even except 21..

#### Question No 46

110 , ? , 99 , 81 , 72 , 63 , 54 , 45

Solution!
Deduct the sum of the digits of the previous number each time..

#### Question No 47

Which is the odd number out, 9421 , 7532 , 9854 , 8612 , 6531 , 8541 ?

Solution!
All the other numbers have their digits in descending order..

#### Question No 48

1 , 4 , 2 , 5 , 3 , 6 , 4 , ?

Solution!
There are two interwoven sequences.! !First starts with 1 and second with 4!Add 1 in both series.

#### Question No 49

100 , 1 , 97.5 , 3.5 , 92.5 , 8.5 , 85 , 16 , ? , ?

Solution!
There are two interwoven sequences.! ! subtract 2.5, 5, 7.5 starting at 100 and Add 2.5, 5, 7.5 starting at 1..

#### Question No 50

100 , 98 , 94 , 88 , 80 , 70 , ?

Solution!
Deduct 2, 4, 6, 8, 10, 12.

#### Question No 51

108 , 189 , 216 , 225 , ?

Solution!
Add 81 , 27 , 9 , 3,....

#### Question No 52

3.4 , 6.3 , 9.2 , 12.1 , 15 , ?

Solution!
Add 2.9 in previous term to find next term..

#### Question No 53

100 , 50 , 200 , 25 , 400 , ?

Solution!
There are two interwoven sequences.! ! Multiply 2 starting at 100 and devide by 2 starting at 50..

#### Question No 54

What four-digit number should replace the question mark? 4342 (3176) 1726, 7995 (7516) 2162, 8418 (????) 1725

Solution!
Delete the digits outside the brackets that appear twice, and insert the remaining digits in the brackets in the same order that they appear outside the brackets!8418 (4725) 1725.

#### Question No 55

N , N , P , L , S , I , W , ?

Solution!
Two parallel series. One with skipping 1 , 2 , 3,... alphabets in forward order and other with skipping same alphabets in reverse order..

#### Question No 56

0 , 100 , 6 , 94 , 12 , 88 , 18 , 82 , ? , ?

Solution!
There are two sequences interwoven.! !Add 6 starting at 0 and deduct 6 starting at 100..

#### Question No 57

3925 and 277 , 4697 and 2416 , 6257 and ?

Solution!
3 * 9 = 27! 5 + 2 = 7!(277).! !4 * 6 = 24!and 9 + 7 = 16!(2416)! !Similarly,!6 * 2 = 12!and 5 + 7 = 12!(1212).

#### Question No 58

64521 is to 41256 as 38297 is to..

Solution!
A B C D E!6 4 5 2 1! !B E D C A!4 1 2 5 6! !A B C D E!3 8 2 9 7! !B E D C A!8 7 9 2 3.

#### Question No 59

Which number is the odd one out, 159, 248, 963, 357, 951, 852 ?

Solution!
In the rest there is the same difference between each digit! eg 8 (-3) 5 (-3) 2.

#### Question No 60

180 , 140 , 179 , 138 , 177 , 134 , ?

Solution!
Two parallel series, one with subtracting 1,2,3,... and other with subtracting 2,4,6,....

#### Question No 61

7/2 , 4 , 7 , 14 , ?

Solution!
Multiply previous 2 numbers and divide by 2..

#### Question No 62

8 , 16 , 32 , 64 , 128 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 63

O , P , R , U , ?

Solution!
Skip 0 , 1 , 2 , 3,... alphabets..

#### Question No 64

B , D , G , K , P , ?

Solution!
Skip 1 , 2 , 3,... alphabets..

#### Question No 65

2 , 6 , 18 , 54 , 162 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 66

Which number is the odd one out, 331, 482, 551, 263, 383, 362, 284

Solution!
In each number except 383, the product of first and third digits is the middle one..

#### Question No 67

1/3 , 3/7 , 6/13 , 10/21 , 15/31 , ?

Solution!
Add 2 , 3 , 4,... in numerator and add 4 , 6 , 8,... in denominator..

#### Question No 68

F , O , T , W , ?

Solution!
Skip 8 , 4 , 2 , 1 alphabets..

#### Question No 69

1 , 1 , 3 , 15 , 105 , ?

Solution!
Multiply by 1, 3, 5, 7, 9.

#### Question No 70

20 , 30 , 45 , ?

Solution!
Multiply previous term with 1.5 to find next term..

#### Question No 71

A , B , D , I , ?

Solution!
Multiply position of previous alphabet with 3 and subtract 1 , 2 , 3,... respectively..

#### Question No 72

Which number is the odd one out, 835, 734, 642, 751, 853, 981, 532

Solution!
In each number except 751, the difference of third and first digit is the middle one..

#### Question No 73

36 , 72 , ? , 144 , 180 , 216 , 252

Solution!

#### Question No 74

Which number is the odd one out, 396, 462, 572, 427, 671, 264

Solution!
In each number except 427, the middle digit is the sum of other two..

#### Question No 75

9 , 16 , 13 , 13 , 17 , 10 , 21 , 7 , ?

Solution!
There are two interwoven sequences! !Add 4 starting with 9! !and subtract 3 starting with 16..

#### Question No 76

2 , -1 , 2 , -1 , 2 , ?

Solution!

#### Question No 77

Which number is the odd one out, 8, 27, 64, 100, 125, 216, 343

Solution!
All others are perfect cube of any number but 100 is not the perfect cube of any number..

#### Question No 78

17 , 34 , 51 , 68 , ?

Solution!

#### Question No 79

100 , 96.75 , 93.5 , 90.25 , 87 , ?

Solution!
Deduct 3.25 each time..

#### Question No 80

2 , 5.75 , ? , 13.25 , 17 , 20.75

Solution!

#### Question No 81

B , W , F , P , M , E , ?

Solution!
Two parallel series one with skipping 3 , 6,... alphabets and other with skipping 6 , 12,... alphabets..

#### Question No 82

5 , 2.5 , 1.25 , 0.625 , ?

Solution!
Divide previous term with 2 to find next term..

#### Question No 83

0 , 7 , 15 , 24 , 34 , ?

Solution!
add 7 , 8 , 9 , 10 , 11,....

#### Question No 84

9 , 11 , 17 , 35 , ?

Solution!
Add 2 , 6 , 18 , 54,...!here!6 = 2*3!18 = 6*3!and!54 = 18*3.

#### Question No 85

Which number is the odd one out, 6, 9, 15, 21, 24, 28, 30

Solution!
Each of the numbers except 28, is a multiple of 3..

#### Question No 86

BZ , EW , HT , KQ , ?

Solution!
Skip 2 alphabets in forward order to find first alphabet and skip 2 alphabets in reverse order to find 2nd alphabet..

#### Question No 87

Which two letters come next in the sequence A , D , I , P , Y , CF , DI , FD , ?

Solution!
take the numerical position of each letter in the alphabet to reveal the sequence of consecutive square numbers 1, 4, 9, 16, 25, 36, 49, 64, 81.

#### Question No 88

17 , 20 , 19 , 22 , 21 , 24 , 23 , ?

Solution!
Add 3 and subtract 1 alternatively..

#### Question No 89

1/32 , 1/16 , 1/4 , 1/2 , 2 , 4 , ?

Solution!
Multiply with 2 and 4 alternatively.

#### Question No 90

2 , 5 , 10 , 17 , 26 , ?

Solution!
add 3 , 5 , 7 , 9 , 11,....

#### Question No 91

7 , 13 , 24 , 45 , 86 , ?

Solution!
Multiply previous term with 2 and subtract 1 , 2 , 3,... to find next term..

#### Question No 92

O , R , M , T , K , V , I , ?

Solution!
Two parallel series one with skipping one alphabet in reverse order and other with skipping one alphabet in forward order..

#### Question No 93

7 , 10 , 25 , 94 , 463 , ?

Solution!
7*2 - 4 = 10!and!10*3 - 5 = 25!and!25*4 - 6 = 94!and!94*5 - 7 = 463!In the same way!463*6 - 8 = 2770.

#### Question No 94

M , F , N , G , R , I , S , L , W , P , ?

Solution!
Two parallel series one with skipping 0 and 3 alphabets alternatively and other with skipping 0 , 1 , 2,....

#### Question No 95

3 , 7 , 2 , 47 , ?

Solution!
3^2 - 7 = 2!7^2 - 2 = 47!In the same way!2^2 - 47 = -43.

#### Question No 96

A , E , X , H , U , ?

Solution!
Two parallel series, one with skipping two alphabets in reverse order and other with skipping two alphabets in forward order.

#### Question No 97

Which number is the odd one out, 16, 25, 36, 72, 144, 196, 225

Solution!
Each of the numbers except 72 is a perfect square..

#### Question No 98

A , Y , W , U , S , Q , ?

Solution!
Skip one alphabet in reverse order..

#### Question No 99

492 , 366 , 189 , 810 , ?

Solution!
8 * 1 = 8, 8 + 0 = 8.

#### Question No 100

156 , 76 , 36 , 16 , ?

Solution!
Subtract 4 from previous term and then divide it with 2 to find next term..

#### Question No 101

B , D , F , H , J , L , ?

Solution!
Skip one alphabet..

#### Question No 102

5 , 26 , 131 , 656 , ?

Solution!
Multiply by 5 and add 1 each time..

#### Question No 103

5 , 5 , 3 , -1 , -7 , ?

Solution!
Subtract 0 ,2 , 4,....

#### Question No 104

100 , 97 , 91 , 82 , ?

Solution!
-3 , -6 , -9 , -12!(Multiples of 3 are subtracted).

#### Question No 105

XYZ , WVV , VSR , UPN , ?

Solution!
Subtract 1 from first 3 from second and 4 from third character..

#### Question No 106

1.5 , 3 , 5.5 , 9 , 13.5 , ?

Solution!
Add 1.5, 2.5, 3.5, 4.5, 5.5.

#### Question No 107

1 , 4 , 9 , 61 , 52 , ?

Solution!
Square 1 , 2 , 3,... and change the sequence of digits..

#### Question No 108

C , G , L , R , ?

Solution!
Skip 3 , 4 , 5,... alphabets..

#### Question No 109

6 , 10 , 18 , 34 , 66 , ?

Solution!
Add 4 , 8 , 16 , 32,....

#### Question No 110

Which number is the odd one out, 1, 4, 9, 16, 20, 36, 49

Solution!
All other numbers are perfect square of numbers but 20 is not perfect square of any number..

#### Question No 111

1 , 1 , 2.5 , 3.5 , 4 , 6 , 5.5 , 8.5 , ? , ?

Solution!
There are two interwoven sequences.! !+1.5 starting at the first 1, and +2.5 starting at the second 1..

#### Question No 112

1 , 2.65 , 4.3 , 5.95 , 7.6 , ?

Solution!
1.65 is adding in each term..

#### Question No 113

3 , 6 , 9 , 12 , 15 , ?